Self-contained rail bond stud terminal



.OGL 14, 1941- H. H. FEBREY 2,259,368

SELF-CONTAINED BAU.: BOND STUD TERMINAL Filed April 17, 1941 .(5 S5 J j hwezfa:

' Patented Oct. 14a, 1941 NITED STATES PATENT OFFICE SELF-CONTAINED aan. BoND STUD 'rEaMmAL Harold H. Febrey, 'South Orange, N. 4J., assigner to The American Steel and Wire Company of New Jersey, a corporation of New Jersey Application April 17, 1941, serial No. 389,051

(cl. 2st-20c) 2 Claims.

This invention relates to rail bond stud terminals of the type adapted forinstallation by way of bottomed rail holes or recesses, and is particularly concerned with signal bond stud terminals of the type installed in bottomed holes l or recesses formed in the sides of the rail heads.

A specic example ofa signal bond having terminals embodying the principles 4of the present invention is illustrated by the accompanying drawing showing the bond with the terminals in the rail holes in longitudinal section, the lefthand terminal being shown prior to itsbeing fixed in position and the right-hand terminal being shown after being iixed.

More specically, in this drawing the terminal is shown as having a head I and a stud 2 with a hole opening from the side of the head opposite the stud and extending through the head and into the stud, the hole terminating inside 4the stud and the portion 3 of the hole within the stud 2 having a smaller diameter than a portion 4 oi the hole within the headincluding the opening to the hole. A malleable metal insert 5 is positioned in the portion 3 of the hole with an end extending toward the portion 4 and terminating short of the junction 6 between the portions 3 and 4. This iunction is slightly above the junction between the terminal stud and head. A tool is retained in the hole with an end 1 exposed beyond the side of the head l opposite the stud 2, this tool having a portion 8 iitting the hole portion 4 and an end portion 9 iltting the hole portion 3.

All the portions of the hole and of the tool are cylindrical and the tool is press-ntted into the hole so that the terminal is self-contained. Hammer blows on the exposed end 1 drive the tool permits the stud 2 to have a suciently thick wall to permit removal of the terminal without fear of stud breakage, while at the same time providing an expanding pin or tool that has a force receiving end that is suiiiciently large in diameter to insure it against being broken when struck by a hammer. It will be noted that the expansive force is coniined entirely to the stud. In addition to these advantages, the new terminal has the 'great advantage that the tool it carries is provided with double guiding bearings for positively preventing tilting of the tool by a carelessly struck hammer blow, this being important since such tilting would jam the tool in the terminal hole and prevent proper use' of the terminal.

I claim:

1. A rail bond terminal having a head and a stud witha hole opening from the side of the head opposite the stud and extending through the head and into the stud, the hole terminating inside the stud andthe portion of the hole within the stud having a smaller diameter than a portion of the hole within the head including the opening to the hole, a malleable insert positioned in the nrst named portion of the hole with an end extending toward the second named portion and terminating short of the junction between the two named portions, and a tool retained in the hole with an end exposed beyond said side of,the head and having a portion iitting the second named hole portion and an end portion bearing on the insert and tting the iirst named hole portion.

2. A rail bond terminal having a head and stud with a hole formed through said head and into said stud. said hole having a relatively larger diameter within said head and a relatively smaller diameter within said stud containing an insert, and a tool carried by said terminal with a portion fitting said large diametered portion oi said hole and another portion tting said small diametered portion of said hole, whereby said tool is provided witha double bearing to prevent its oanting when put to use to expand said insert.

` HAROLD H. FEBREY. 

